@misc{IVP_2020_28_4_a1,
     title = {To the memory of {Yuri} {I.} {Levin}},
     journal = {Izvestiya VUZ. Applied Nonlinear Dynamics},
     pages = {347},
     publisher = {mathdoc},
     volume = {28},
     number = {4},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVP_2020_28_4_a1/}
}